Some maps previously bound within the factbook are also issued separately and distributed with unique Supt. of Docs. class nos.: Physical map of the world (PREX 3.10/4-2), Standard time zones of the world (PREX 3.10/4-3), and Political map of the world (PREX 3.10/4-4).Some v. also distributed to depository libraries in CD-ROM, 1995-<1998>.Vol. for 1996 distributed to Regional depository libraries in paper; distributed to other depository libraries in microfiche.